20442066 has 16 divisors (see below), whose sum is σ = 40944288. Its totient is φ = 6804000.

The previous prime is 20442061. The next prime is 20442091. The reversal of 20442066 is 66024402.

It is not an unprimeable number, because it can be changed into a prime (20442061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2766 + ... + 6966.

It is an arithmetic number, because the mean of its divisors is an integer number (2559018).

Almost surely, 2^20442066 is an apocalyptic number.

20442066 is an abundant number, since it is smaller than the sum of its proper divisors (20502222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20442066 is a wasteful number, since it uses less digits than its factorization.

20442066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20442066 is about 4521.2903025574. The cubic root of 20442066 is about 273.4271245979.

Adding to 20442066 its reverse (66024402), we get a palindrome (86466468).

The spelling of 20442066 in words is "twenty million, four hundred forty-two thousand, sixty-six".